127728507 has 8 divisors (see below), whose sum is σ = 179268160. Its totient is φ = 80670600.

The previous prime is 127728481. The next prime is 127728511. The reversal of 127728507 is 705827721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 127728507 - 2¹⁵ = 127695739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127728547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1120369 + ... + 1120482.

It is an arithmetic number, because the mean of its divisors is an integer number (22408520).

Almost surely, 2^127728507 is an apocalyptic number.

127728507 is a deficient number, since it is larger than the sum of its proper divisors (51539653).

127728507 is a wasteful number, since it uses less digits than its factorization.

127728507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240873.

The product of its (nonzero) digits is 54880, while the sum is 39.

The square root of 127728507 is about 11301.7037211210. The cubic root of 127728507 is about 503.6118555083.

The spelling of 127728507 in words is "one hundred twenty-seven million, seven hundred twenty-eight thousand, five hundred seven".